Disk liner for centrifugal machines.



M. LEITCH DISK LINER FOR CENTRlFUGAL MACHINES; APPLlCATlON FILED SEPT 21.1914.

1,160,624. Patented Nov. 16,1915.

WITNESSES INVENTOR 4 TTUR/VEYS UNITED STATES PATENT OFFICE.

MEREDITH LEITCH, or roiienknnrsrn. NEW YORK. ASSIGNOR TO THE'DE LAVAL SEPARATOR COMPANY, OF NEW YORK, N. Y. A CORPORATION OF NEW JERSEY.

DISK LINER FOR CENTRIFUGAL MACHINES.

Specification of Letters Patent.

Patented Nov. 16. 1915.

Application filed September 21, 1914. Serial No. 862.684. I

will enable others skilled in ,the art to which rear edges of the notches. The present invention relates to CllSli' it appertains. to make and use the same.

liners for centrifugal machines, that is to say, plates having the form of the frustunr of a cone and whose function is to divide the fluid to be centrifugalized into thin layers, for which purpose the said disk liners are nested, one above the other. in the centrifugalizing. space. the individual members of the series being kept apart by separate calks so as to maintain the proper spacing between the disk liners. u

The invention is of particular importance in the construction of disk liner for cream separators. although it has get =al applicability to disk liners employed in other centrifugalizing machines, as. for instance, in

centrifugal clarifiers, centrifugal filters, and.

the like.

The main purposes of the invention are fourfold; first. to so locate the calks as to cause a minimum. interference with the currents of liquid between the disks; secondly, to so place the calks as to reinforce the disks and provide more stock at points of maximunf wear; thirdly, to make the calks of material ordinarily thrown away as scrap; and, fourthly, to avoid the necessity and the expense of using jigs for properly locating the calks on the disks as in the common practice of welding calks on disks. The

manner in which these several objects are attained. will be hereinafter more fully set forth.

In the accompanying drawing,-Figure 1 represents a top plan view of a disk made in accordance with the invention, the dotted lines indicating the original position of the stock from which the calks are made and which usually constitute part of the scrap; Fig. 2 represents a side elevation of the disk shown in Fig. 1.

Similar letters of reference indicate similar part both views. P finfito the drawing, it will be noted that the disk represented therein is of the type, familiarly employed in centrifugal cream separators. centrifugal clarifiers, and centrifugal filters. wherein notches aare provided which engage with and lit over guide wingson the central hollow stem of the bowl. Innesting together a series of such disks, the notched portions of the disk slide down the sides of the guide-wings, and

the maximum wear is at the forward and At the extremiouter diameter of'the disk represented by the horizontal edge portion 7' there is a flow of skim milk outwardly. incream, separators and practically no flow ofcream; consequently, because of the large diameter, there is a maximum area of milk flow along this outer edge, so that the location of the calks will cause a minimum interference with the milk outflow ifthey are spaced along the outer edge. so also, in cream-separators,' placing theinner row of calks close to the sides of the guide-wings'will cause minimum interference with the inward flow of. cream, in the operation of a cream separator. In the practice of the invention, I reserve from the otherwise scrap stock, usually cut off and discarded at the outer lower periphcry of the disks in bringing them to form, a series of projections'as indicated by the dotted lines o in F 1. These projections e are thus saved from the stock that is usually scrapped and are then folded backonthe body of the disk to form the series of lower calks (Z along the trimmed edge portion, where, by reason of their favorable location they cause a minimum interference with the.

milk flow. So also, in cutting out the notches a, I reserve from the otherwise scrapped stock, the projectionsshown in dotted lines and marked 0 in Fig. 1. Theseprojections are thereupon folded back upon the body of the disks, at the radial side edges of the notches, so as to form the calk I). These calks b are located at the points of maximum wear where the disks slide down the sides of the guide-wings and double the thickness of metal available forwear at those points. r I

It is, of course, evident that the calks d and I) may be formed by bending themetal either upon the outer or upon the innersurface of the disk, without departing from the spirit of the invention, although, for

" minimum interference with the li the mover on the upper side of the dia as shown. So also, whlle, in addition to the utilization of otherwise scrap metal to formv the calks ,"it is of advantage to make them of- ,5 the same material as the disks so as to avoid the necessity for using jigs to locatefthem thereon, it may be further pointed out that the advantageous position of the calks at the points'where they exercise respectively I quid constitunt's' "of the full milk undergoing separation may be realized by making the calks of separate pieces Welded in place, and I accordingly desire to include this Within the scope of my invention.

What I'claim is 1.. A' disk for centrifugalizing machines having anaouter row or series or" calks extending radially inward at the extreme outer 2Q edge of the disks, and having an inner row or series of calks at the sides of the notches for the guide-Wings.

-' 2.iA' disk for centrifugalizing machines having an inner row or series of calks-at the sides of the notches for the guide-Wings.

3. A disk for centrifugalizing machines having an outer row or series of calks consisting of stock ordinarily trimmed ofi? from the outer diameter of the periphery, the stock thus saved being bent back upon the disk in the form of tongues extending radially inWard'to form said' calks.

4. A disk for centrifug-alizing machines having an inner roW or series of calks adj acent to the guide-Wing notches, said calks being formed ,from material ordinarily punched out of said notches, said material being bent back upon the body of the disk at opposite sides of the notches.

In testimony whereof I 'afiix my signature, in presence of two Witnesses.

MEREDITH LEITCH.

Witnesses:

CHARLES L. POWELL,

WM. AQ'HUBBARD. 

